3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to
measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at
each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above
measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A
leakage current tester (Simpson Model 229 or equivalent) may be
used to make the hot checks, leakage current mu3st not exceed 1/
2 milliamp. In case a measurement is outsideof the limits
specified, there is a possibility of a shock hazard, and the
equipment should be repaired and rechecked before it is returned
to the customer.
2. PREVENTION OF ELECTRO STATIC DISCHARGE
(ESD) TO ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical
ES devices are integrated circuits and some field-effect transistorsand semiconductor "chip"
components. The following techniques should be used to help reduce the incidence of
component damage caused by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and
wear a commercially available discharging ESD wrist strap,
whichshould be removed for potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices,
place the assembly on a conductive surface such as alminum foil,
to prevent electrostatic charge buildup or exposure of the
assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static solder removal device. Some solder
5
Summary of Contents for DMR-E80HPC
Page 12: ...6 2 3 Other Items needed Digital P C B HDD Conditions Nothing special 12 ...
Page 47: ...16 2 Casing Parts Mechanism Section 2 47 ...
Page 48: ...16 3 Packing Accessories Section 48 ...
Page 56: ...LB7402 03 J0JHC0000032 COIL 2 56 ...
Page 61: ...W501 08 ERJ3GEY0R00V 1 16W 0 8 61 ...
Page 63: ...C50028 ECJ1VF1C104Z 16V 0 1U 1 63 ...
Page 71: ...C122 KMG1E470 25V 47 1 71 ...
Page 148: ...1 A B C D 2 3 4 5 6 7 8 9 FRONT L P C B DMR E80H P PC FRONT L P C B REP3528DB ...
Page 149: ...1 A B C D 2 3 4 5 6 7 8 9 FRONT R P C B DMR E80H P PC FRONT R P C B REP3528EA ...
Page 158: ...5 6 7 8 Location Map DMR E80H P PC Main P C B REP3497M 2 4 Section 1 4 2 4 3 4 4 4 REAR FRONT ...
Page 160: ...Location Map DMR E80H P PC Main P C B REP3497M 4 4 Section 1 4 2 4 3 4 4 4 REAR FRONT ...
Page 176: ...1 A B C 2 3 4 5 6 7 8 9 ATAPI P C B DMR E80H P PC ATAPI P C B REP3542A ...
